Mobile device signal booster



FIG. 1 is a top perspective view of the presently claimed design.

FIG. 2 is a side view of the presently claimed design.

FIG. 3 is an opposite side view of the presently claimed design.

FIG. 4 is a front view of the presently claimed design.

FIG. 5 is a rear view of the presently claimed design.

FIG. 6 is a top view of the presently claimed design; and,

FIG. 7 is a bottom view of the presently claimed design.

The broken lines in the drawings are for the purpose of illustrating portions of the mobile device signal booster that form no part of the claimed design. 

CLAIM The ornamental design for a mobile device signal booster, as shown and described. 